| 1. | One must purchase an Esrog with a hechsher (certification) that it is neither grafted nor prohibited to be eaten. |
| 2. | The size of an Esrog is of utmost importance. The minimum required size is the size of an egg. That translates into approximately 2.2 - 3 fluid ounces. |
| 3. | The Esrog purchased must be complete. If even a small piece is missing, the Esrog is rendered unfit for use on the first day of the Succot holiday. If the “pittam” (tip) breaks off, one should ask a Rabbinic authority. |
| 4. | The color of an Esrog also plays a key role. Some color changes can render the Esrog unfit for use, depending on the specific color and placement on the Esrog. One must have a well-trained eye to differenciate between the colors, as well as be well versed in the intricate laws regarding the subject. |
| 5. | The Esrog should be shaped like a tower, straight on the top and recessed on the bottom. |
| 6. | The Esrog should have a rough, bumpy surface, as opposed to a smooth surface. In most cases, the last two requirements will not disqualify the use of the Esrog on Succos. |
